I have a 2021 Cube Reaction Pro 500 which has a standars ACID E-Crank, 38T . I have just had to change the cassette having worn through the smallest 12th gear after 4000 miles. I do find it under-geared for me as I spend 95% of my time on that cog. Has anybody fitted a larger crank cog to this bike. There doesn't look a great deal of room with the frame recess. Any info much appreciated